According to a new study published in Addiction Neuroscience, cannabidiol (CBD) could protect against the behavioral effects of cocaine and caffeine when used together, by altering gene expression in a key brain region associated with reward.
Researchers from Universidad de la República and the Biological Research Institute Clemente Estable in Uruguay conducted the study on male mice, using a model of locomotor sensitization—a process linked to addiction that results in heightened activity following repeated drug exposure. Mice that received CBD before being given both cocaine and caffeine showed significantly reduced sensitization compared to those given the stimulants without CBD.
Using RNA sequencing of tissue from the nucleus accumbens, a brain region tied to motivation and addiction, the study found that CBD altered the expression of genes related to the extracellular matrix and cell-to-cell signaling. These changes suggest that CBD may interfere with the structural remodeling and neuroinflammatory processes typically triggered by psychostimulants.
One gene, Tnc (tenascin C), was highlighted as a particularly promising target for future research. The authors say their findings shed new light on how CBD may counteract the molecular changes underlying stimulant-related behaviors, opening new therapeutic possibilities for treating stimulant use disorders.
The study concludes by stating:
Our study identifies pathways involved in CBD’s protective effects on cocaine and caffeine-induced sensitization. This provides valuable and novel insights into molecular mechanisms of CBD putatively associated with a protective effect on psychostimulant actions. Identified pathways and genes, particularly those related to extracellular matrix organization, offer potential therapeutic targets for future studies that may open new avenues for psychostimulant use disorder treatment strategies.
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